Hand sanding machine



De@ 3, 1929-. E. l. DoDDs ET AL 1,738,062

HAND SANDING MACHINE Filed Jan. 5, 1927 wil/11114: A.

-7/ 20 Il l\|| 20 it/1an Dodds f fha/7 /4 @Odds Jr Patented Dec. 3, 1929UNITED STATES PATENT OFFICE ETHAN I. DODDS, F CENTRAL VALLEY, AND ETHANI. DODDS, JR., OF NEW YORK, N. Y.; SAID ETHAN I. DODDS, JR., ASSIGNOR TOSAID ETHAN I. DODDS, SR.

HAND SAN DING MACHINE Application led January 5, 1927. Serial No.159,082.

This invention relates to a sanding machine. primarily adapted forsanding parts of vehicles and the like` but susceptible of `general usefor sanding purposes.

It is an object of this invention to provide a light machine of thecharacter stated which can be easily held by the hand of the operatorand applied to the part to be sanded; a motor and suitable mechanismcausing a sanding of the parts.

This'invention comprises the novel structure and combination of partshereinafter described and more particularly pointed out and defined inthe appended claims.

ln the accompanying drawings which illus trate a preferred embodiment ofthis invention and in which similar reference numerals re'fer to similarportions in the diii'erent viewsA (in the drawings:

Figure 1 is an elevational view ot a sanding` machine involving thisinvention with parts shown in section.

Figure 2 is an enlarged sectional view upon the line HMH.

Figure 3 is a fragment-ary end elevational view taken upon the lineIIT-III of Figure l with the vibrating carriage omitted.

Figure l is an end elevational View.

its an exemplitication ot this invention, there is shown a base 1 havingspaced stand a rds Q rising therefrom. A motor housing or casing 3 isattached to the base and is provided with a handle 4 whereby the machinemay be held by the operator and applied to the work.

Upon thestandards 2 are journaled the gears 5--5 having irregularresilient pads. To this end each gear 5 is provided upon its outer facewith a resilient and sloping contact means or hump which consists of anouter steel plate 6 or the like and an inner wedge shaped rubber pad 7or the like. It will be noted that the Contact means on the two gears 5are reversely arranged so that when the thickest portion of one isdirected upwardly, the thickest portion of the other is directeddownwardly.

The gears 5 mesh with small pinions 8-8 which are secured upon the endsof a motor shaft 9 extending through the casing 3, the I motor beingmounted with the casing.

A vibrating member is provided in the form of a U-shaped frameand itconsists of a support l0 having a sort ot dove tail 11 slidableconnection with the base l which is provided with suitable bearingstrips 11a having sloping sides to receive the dovetail, the base havinglateral depending flanges 1a against which the strips are positioned.This base has a pair of oppositely .disposed upstanding arms 12 whichterminate in bearings 15%*13 at their upper ends. These bearings havelongitudinal bores closed by screw plugs 14. Resilient packing 15 suchas rubber or the like is inserted in the bores and is compressed betweenthe screw plugs 14 and anti-friction means 16 confined at the inner endsof said bores. The anti-friction means which are shown as in the torm ofround elements or balls are in contact with the sloping means on thesides of the gears 5 for a purpose that will later appear.

Upon the bottom of the support 10, there is a resilient strip 17 otrubber or the like, and a strip of abrasive material 18 such as sand oremery paper is applied over the strip 17 g opposite ends ot said strip17 are brought up against the outer ends ot the arms 12 und clampedthereagainst by metal clamps 19 on screws 2U set in the arms 12.

ln the operation oi" the ma chinee the motor will be started foroperating the gears 5, which during their rotation will cause thevibration or backward and forward movement of the vibrating member. Thismovement is brought about by the inclined humps on the gears 5 which areoppositely inclined, for as the thick part of one hump rides oil itsbearing ball 1G, the thick part of the other hump will ride upon itsbearing ball. Consequently, there will be a vibratory or reciprocatorymovement ot the vibrating member which carries the abradant means and itwill be obvious that if the machine in operation is applied to any partsthat need polishing or that need to be rendered smooth, the vibration ofthe abradant surface thereover will quickly accomplish the desiredresult.

We are aware that many changes may be made, and numerous details ofconstruction may be varied through a wide range without departin fromthe principles of this invention, an we therefore do not purposelimiting the patent granted hereon, otherwise than necessitated by theprior art.

We claim as our invention:

1. In a sanding machine, a stationary member including a motor, a pairof gears on said member and driven by said motor, said gears havingoppositely disposed resilient and inclined faces, a U shaped framehaving a slidable connection with said stationary member, the arms ofsaid U shaped frame having anti- -friction means in engagement with`said inclined faces and abrasive means carried by said U shaped frame.

2. In a sanding machine, a motor having a shaft, a frame for supportingthe motor, an abradant member slidably mounted upon the bottom of theframe, said member having upstanding arms and driving means between theends of the motor shaft and said arms.

3. In a sanding machine, a frame, a motor su ported thereon, an abradantmember slidabile upon said frame, said motor having a shaft, and adriving connection between each end of said shaft and said member.

In testimony whereof, we have hereunto subscribed our names.

ETHAN I. DODDS. ETI-IAN I. DODDS, JR.

